Tube-expander



A. S. ROBINSON.

TUBE EXPANDER, APPLiCATION FILED FEB-8,1919.

1 $05,669, Patented 3111153, 1919.

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ALBERT S, ROBINSON, OF WESTON, COLORADO.

TUBE-EXPANDER.

Specification of Letters Patent.

Patented June 3, 1919.

Application filed February 8, 1919. Serial No. 275,819.

To all whom it may concern:

Be it known that I, ALBERT S. ROBINSON, a citizen of the United States,residing at Veston, in the county of Las Animas and State of Colorado,have invented certain new and useful Improvements in Tube-Expanders, ofwhich the following is a specification, reference being had to theaccompanying drawings.

This invention relates to certain improvements in tube expanders, and itis an object of the invention to provide a device of this generalcharacter with novel and improved means whereby the expander may beproperly engaged within a tube to be worked without the necessity of theoperator entering within a firebox, and also whereby the necessity ofextinguishing the fire or reducing the steam pressure within the boileris unnecessary.

The invention consists in the details of construction and in thecombination and arrangement of the several parts of my improved devicewhereby certain important advantages are attained and the devicerendered simpler, less expensive and otherwise more convenient andadvantageous for use, as will be hereinafter more fully set forth.

The novel features of my invention will hereinafter be definitelyclaimed.

In order that my invention may be the better understood, I will nowproceed to describe the same with reference to the accompanyingdrawings, wherein:

Figure 1 is a view in side elevation of a tube expander constructed inaccordance with an embodiment of my invention, the coacting part of aboiler structure being diagrammatically indicated by dotted lines; and

Fig. 2 is a view partly in elevation and partly in section of myimproved device with the elongated rod shown in position to operate as ahammer.

As disclosed in the accompanying drawings, 1 denotes an elongatedtubular member open at both ends and which is of a length to be readilyinserted through the door of a firebox and to closelyapproach the boilerflue sheet.

E denotes a tube expander of any ordinary or preferred type, and whichincludes a mandrel 2 extending within an end portion of the elongatedmember 1 and suitably secured thereto as at 3. The opposite end portionof the member 1 is provided with laterally directed handle members 4:whereby rotary movement may be imparted to the member 1 with a resultantrotation of the expander E when it is desired to roll the tube in place.

R denotes an elongated rod which is readily insertible within the member1 through its outer end, and which rod R serves as a hammer wherebyrequisite impact may be imposed upon the mandrel 2 of the expander E toefi'ect the requisite expanding operation when said expander E isproperly engaged within a tube.

An end portion of the rod R is provided with a laterally directed saddleor yoke 5 which is adapted to be engaged with the mandrel 2 of theexpander in order to facilitate the proper application of said expanderE within the end portion of a tube to be worked. The rod R is of alength to permit the expander E to be properly engaged within a tubewithout the necessity of the operator entering within the firebox of aboiler and, as has been fully demonstrated in practice the rod R can beemployed to properly position the expander E without the necessity ofthe fire being extinguished or the pressure within the boiler beingreduced.

From the foregoing description, it is thought to be obvious that a tubeexpander constructed in accordance with my invention is particularlywell adapted for use by reason of the convenience and facility withwhich it may be assembled and operated and it will also be obvious thatmy invention is susceptible of some change and modification withoutdeparting from the principles and spirit thereof, and for this reason Ido not wish to be understood as limiting myself to the precisearrangement and formation of the several parts herein shown in carryingout my invention in practice except as hereinafter claimed.

I claim:

In combination, an elongated tubular member, an expander including amandrel extending within an end portion of the tubular member andsecured thereto, and an elongated rod insertible through the oppotofacilitate the fitting of the expander site end portion of the tubularmember and Within a tube. 10 adapted to serve as a hammer to lmpose Intestimony whereof I hereunto affix my requlsite lmpact upon the mandrelof the slgnature 1n the presence of two wltnesses.

expander to efiect an expansion operation, ALBERT S. ROBINSON. an endportion of said rod being provided lVitnesses:

with a saddle to receive the mandrel of the JnsUs M. MARTINEZ,

expander whereby the rod may be employed IRA B. GALE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

